AWS S3中缺少区域参数？

Question

我正在我的Symofony 3.4项目中实施Amazon Web Services，但是当我触发测试URL时，它会抛出：

Missing required client configuration options:
  region: (string)  A region configuration value is required.

我所在的控制台是EU（爱尔兰），我已经检查了文档并以此放置参数。

这是我的service.yml

 demo_storage:
    class: App\Service\S3\S3Service
    arguments:
        - "test.app" # Name of Bucket
        - credentials:
            key:     "%amazon_key%"
            secret:  "%amazon_secret%"
            region:  "eu-west-1"    
            version: "2006-03-01"      
    public: true